v3.26.1
Cash and cash equivalents (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Cash and cash equivalents (Details) [Line Items]      
Cash and cash equivalents ¥ 81,154 $ 11,605 ¥ 126,614
Restricted usage cash 1,100   12,800
CHINA [Member]      
Cash and cash equivalents (Details) [Line Items]      
Cash and cash equivalents ¥ 81,700   ¥ 125,600